Threat Description

Thursday 12th


Category: Malware
Type: Virus
Platform: W32
Aliases: Thursday 12th, CD


This virus activates on Thursday the 12th, popping up a window with a warning that the next day is Friday the 13th. It pretends to be an anti-virus program, called VirCheck V1.2

The virus avoids infecting programs with names containing the following patterns:

    SCAN     (McAfee's SCAN)       CLEAN    (McAfee's CLEAN)       VIR      (Various anti-virus programs)       ARJ      The ARJ compression program       FLU      FLUSHOT+ from Ross Greenberg       COMMAND  COMMAND.COM  


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.


More information on scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.


Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Learn More